shielded cable and grounding loops ?

Hi, I’ve read http://forum.mikrotik.com/t/how-do-you-ground-shielded-cable/52549/1 , wiki page about grounding, and various other forums…

I don’t have outdoor equipment like in the wiki page, just a home with network outlets, ftp cable, patch panel (all shielded), rb2011, adsl modem, …

I could ground the rb2011, the patch panel, and use shielded cables also from network outlets to devices.
Or I could just ground cables on one side, using utp cables from the wall to the devices.
Sometimes, I just cannot ground cable on both sides (stuff with external dc power supply, or poe devices), but when I’m able to do it (eg. desktop PC), should I do it?

Greetings

YES